add twitter api

lib/core/address_validator.dart

@@ -198,4 +198,22 @@ class AddressValidator extends TextValidator {
         return [];
     }
   }
+
+  static String? getAddressFromStringPattern(CryptoCurrency type) {
+    switch (type) {
+      case CryptoCurrency.xmr:
+        return '([^0-9a-zA-Z]|^)4[0-9a-zA-Z]{94}([^0-9a-zA-Z]|\$)'
+            '|([^0-9a-zA-Z]|^)8[0-9a-zA-Z]{94}([^0-9a-zA-Z]|\$)'
+            '|([^0-9a-zA-Z]|^)[0-9a-zA-Z]{106}([^0-9a-zA-Z]|\$)';
+      case CryptoCurrency.btc:
+        return '([^0-9a-zA-Z]|^)1[0-9a-zA-Z]{32}([^0-9a-zA-Z]|\$)'
+            '|([^0-9a-zA-Z]|^)1[0-9a-zA-Z]{33}([^0-9a-zA-Z]|\$)'
+            '|([^0-9a-zA-Z]|^)3[0-9a-zA-Z]{32}([^0-9a-zA-Z]|\$)'
+            '|([^0-9a-zA-Z]|^)3[0-9a-zA-Z]{33}([^0-9a-zA-Z]|\$)'
+            '|([^0-9a-zA-Z]|^)bc1[0-9a-zA-Z]{39}([^0-9a-zA-Z]|\$)'
+            '|([^0-9a-zA-Z]|^)bc1[0-9a-zA-Z]{59}([^0-9a-zA-Z]|\$)';
+      default:
+        return null;
+    }
+  }
 }

lib/entities/parse_address_from_domain.dart

@@ -1,18 +1,19 @@
+import 'package:cake_wallet/core/address_validator.dart';
 import 'package:cake_wallet/core/yat_service.dart';
 import 'package:cake_wallet/entities/openalias_record.dart';
 import 'package:cake_wallet/entities/parsed_address.dart';
 import 'package:cake_wallet/entities/unstoppable_domain_address.dart';
 import 'package:cake_wallet/entities/emoji_string_extension.dart';
+import 'package:cake_wallet/twitter/twitter_api.dart';
+import 'package:cw_core/crypto_currency.dart';
 import 'package:cw_core/wallet_type.dart';
 import 'package:cake_wallet/entities/fio_address_provider.dart';
 
 class AddressResolver {
-  
   AddressResolver({required this.yatService, required this.walletType});
-  
   final YatService yatService;
   final WalletType walletType;
-  
+
   static const unstoppableDomains = [
   'crypto',
   'zil',
@@ -26,9 +27,28 @@ class AddressResolver {
   'blockchain'
 ];
 
+  static String? extractAddressByType({required String raw, required CryptoCurrency type}) {
+    final addressPattern = AddressValidator.getAddressFromStringPattern(type);
+
+    if (addressPattern == null) {
+      throw 'Unexpected token: $type for getAddressFromStringPattern';
+    }
+
+    final match = RegExp(addressPattern).firstMatch(raw);
+    return match?.group(0)?.replaceAll(RegExp('[^0-9a-zA-Z]'), '');
+  }
+
   Future<ParsedAddress> resolve(String text, String ticker) async {
     try {
-      if (text.contains('@') && !text.contains('.')) {
+      if (text.startsWith('@') && !text.substring(1).contains('@')) {
+        final formattedName = text.substring(1);
+        final twitterUser = await TwitterApi.lookupUserByName(userName: formattedName);
+        final address = extractAddressByType(raw: twitterUser.description ?? '', type: CryptoCurrency.fromString(ticker));
+        if (address != null) {
+          return ParsedAddress.fetchTwitterAddress(address: address, name: text);
+        }
+      }
+      if (!text.startsWith('@') && text.contains('@') && !text.contains('.')) {
         final bool isFioRegistered = await FioAddressProvider.checkAvail(text);
         if (isFioRegistered) {
           final address = await FioAddressProvider.getPubAddress(text, ticker);
@@ -58,7 +78,7 @@ class AddressResolver {
       final record = await OpenaliasRecord.fetchAddressAndName(
           formattedName: formattedName, ticker: ticker);
       return ParsedAddress.fetchOpenAliasAddress(record: record, name: text);
-      
+
     } catch (e) {
       print(e.toString());
     }

lib/entities/parsed_address.dart

@@ -1,8 +1,7 @@
 import 'package:cake_wallet/entities/openalias_record.dart';
 import 'package:cake_wallet/entities/yat_record.dart';
-import 'package:flutter/material.dart';
 
-enum ParseFrom { unstoppableDomains, openAlias, yatRecord, fio, notParsed }
+enum ParseFrom { unstoppableDomains, openAlias, yatRecord, fio, notParsed, twitter }
 
 class ParsedAddress {
   ParsedAddress({
@@ -62,6 +61,14 @@ class ParsedAddress {
     );
   }
 
+  factory ParsedAddress.fetchTwitterAddress({required String address, required String name}){
+    return ParsedAddress(
+      addresses: [address],
+      name: name,
+      parseFrom: ParseFrom.twitter,
+    );
+  }
+
   final List<String> addresses;
   final String name;
   final String description;

lib/src/screens/send/widgets/extract_address_from_parsed.dart

@@ -28,6 +28,11 @@ Future<String> extractAddressFromParsed(
       content = S.of(context).openalias_alert_content(parsedAddress.name);
       address = parsedAddress.addresses.first;
       break;
+    case ParseFrom.twitter:
+      title = S.of(context).address_detected;
+      content = S.of(context).openalias_alert_content(parsedAddress.name);
+      address = parsedAddress.addresses.first;
+      break;
     case ParseFrom.yatRecord:
       if (parsedAddress.name.isEmpty) {
         title = S.of(context).yat_error;

lib/twitter/twitter_api.dart

@@ -0,0 +1,37 @@
+import 'dart:convert';
+import 'package:cake_wallet/twitter/twitter_user.dart';
+import 'package:http/http.dart' as http;
+import 'package:cake_wallet/.secrets.g.dart' as secrets;
+
+class TwitterApi {
+  static const twitterBearerToken = secrets.twitterBearerToken;
+  static const httpsScheme = 'https';
+  static const apiHost = 'api.twitter.com';
+  static const userPath = '/2/users/by/username/';
+
+  static Future<TwitterUser> lookupUserByName({required String userName}) async {
+    final queryParams = {'user.fields': 'description'};
+
+    final headers = {'authorization': 'Bearer ${secrets.twitterBearerToken}'};
+
+    final uri = Uri(
+      scheme: httpsScheme,
+      host: apiHost,
+      path: userPath + userName,
+      queryParameters: queryParams,
+    );
+
+    var response = await http.get(uri, headers: headers);
+
+    if (response.statusCode != 200) {
+      throw Exception('Unexpected http status: ${response.statusCode}');
+    }
+    final responseJSON = json.decode(response.body) as Map<String, dynamic>;
+
+    if (responseJSON['errors'] != null) {
+      throw Exception(responseJSON['errors'][0]['detail']);
+    }
+
+    return TwitterUser.fromJson(responseJSON['data'] as Map<String, dynamic>);
+  }
+}

lib/twitter/twitter_user.dart

@@ -0,0 +1,16 @@
+class TwitterUser {
+  TwitterUser({required this.id, required this.username, required this.name, this.description});
+
+  final String id;
+  final String username;
+  final String name;
+  final String? description;
+
+  factory TwitterUser.fromJson(Map<String, dynamic> json) {
+    return TwitterUser(
+        id: json['id'] as String,
+        username: json['username'] as String,
+        name: json['name'] as String,
+        description: json['description'] as String?);
+  }
+}